Error code
Baxi Boiler Fault Code E28
Quick answer
E28
Condensate, drainage, or pump protection issue
First safe action
Check the manual for any weather-related condensate guidance intended for homeowners.
Meaning
Baxi boiler fault code E28 usually points to a condensate, drainage, or related protection issue that is stopping the boiler from operating normally.
Likely causes
- Condensate pipe restriction or freezing
- Drainage-related lockout
- Associated sensor or pump protection fault
Safe first checks
- Check the manual for any weather-related condensate guidance intended for homeowners.
- Only carry out external checks that are clearly described by the manufacturer.
- Stop and book an engineer if the boiler remains locked out.
How to reset
- Use the standard reset only after any permitted user checks are complete.
- Do not keep resetting if the code returns.
When to call an engineer
If the issue is not an obvious and safely accessible condensate problem, stop and arrange a qualified heating engineer.
Safety warning
Do not dismantle the boiler or sealed drainage components. Use only user-level checks described by the manufacturer.
Useful hub links
Related fault codes
E10 for Baxi Boiler
A boiler sensor is giving an invalid reading
E20 for Baxi Boiler
A boiler sensor is giving an invalid reading
E50 for Baxi Boiler
Control board or internal communication fault
E53 for Baxi Boiler
A boiler sensor is giving an invalid reading
E1 for Baxi Boiler
A boiler sensor is giving an invalid reading
E55 for Baxi Boiler
Control board or internal communication fault
Relevant guides
Frequently asked questions
Can I keep resetting a Baxi boiler with E28?+
No. If E28 returns after one standard user reset, stop there and arrange a qualified engineer if the manual gives no safe next step.
Is E28 something I can repair myself?+
Boiler faults should be treated cautiously. Stay within the user checks in the manual, and leave gas, combustion, and internal boiler repairs to a qualified professional.